package li;

import java.util.Scanner;

public class day911 {
    public static void main(String[] args) {
        System.out.println("请输入对称字符串");
        Scanner sc= new Scanner(System.in);
        String s=sc.nextLine();
StringBuilder sb=new StringBuilder(s);
        sb.reverse();
        String ss = sb.toString();
        if(s.equals(ss)){
            System.out.println("是");
        }else{
            System.out.println("不是");
        }
    }

}
